Bearing for skiving machines



Dec. 18 1923. 11,477,945

G. H. DIEHL, JR

BEARING FOR SKIVING MACHINES Filed Nov. 26, 1921 feed wheel Patented Dec. 18, 1923.

GEORGE H. DIEHL, JR., 013 NEW YGBK, N. Y.

-BEARING roe. sizrvrne MACHINES.

Application filed November 26, 1921. Serial No. 517,902.

To aZZ whom it may concern Be it known that I, GEORGE H. DIEHL, J12, a citizen of the United States, residing in the borough of Manhattan of the city of New York, in the State of New York, have invented certain new and useful Improvements in Bearings for Skiving Machines, of which the following is a specification, reference being had to the accompanying drawing, forming a part thereof. 7 i

This invention relates generally to machines for skiving and splitting leather, etc.. in which a rotary annular knife is employed, and in which a feed wheel or roller supports the work in proper relation to the annular knife. The means for supportingthe feed wheel must be suchas not to interfere with the movement of the work, as to support the yieldingly with respect to the knife, and as to permit the feed wheel to move in two planes with respect to the knife Means for supporting the feed roller are shown and described in Letters Patent of the United States No. 949,062. dated February 15, 1910, and the present invention has for its object to improve such supporting means and particularly to facilitate the removal of the feed roller from its working position, the frequent removal of the feed roller from working position being found to be necessary in the operation of the machine. In the use of the construction shown and described in said Letters Patent it is necessary, in order to permit the removal of the feed roller, to back off one or both of the pivot screws which engage the rock shaft by which the feed roller is supported. This operation requires considerable time and also requires the readjustment of the pivot points after each operation. By the present invention means are provided whereby the rock shaft is disengaged readily from the pivot points without requiring movement of either of the pivot points. Other features of improvement will be referred to hereinafter and the invention will be fully explained with reference to the accompanying drawing in which it is illustrated and in which- Figure 1 is a view, partly in plan and partly in horizontal section, of so much of a skiving machine to which the invention is applied as is necessary to enable the invention to be understood.

Figure 2 is a view of the same in front elevation, with the frame of the machine partlj broken away.

Figure 3 is a view in end elevation of the feed roller and its supporting devices as seen from the right hand in Figure 2, a portion of. the knife and the frame being shown in section.

A skiving machine of the general charactor of that to which the invention is applied, as shown in the drawing, comprises an annular knife a which is mounted upon a suitable frame I; to rotate at high speed. Above the upper limb of the knife is mounted a presser foot, not necessary to be shown, and immediately below the same but on the opposite side of the knife edge is mounted the feed roller 0, with the support of which the present invention is particularly concerned. Ingeneral the construction of the supporting devices for the feed roller is similar to that illustrated in said Letters Patent the relation of the present improvement to the general structure may be understood more readily the supporting devices will be described in their entirety.

The feed roller is mounted upon a stud 0? carried by a bracket arm e which, instead of being yoke-shaped, as shown in said Letters Patent, is formed with a spindle e which is swivelled in a cross head 7, formed on a rock shaft eccentrically to the axis thereof. An arm 0 which is fixed to the spindle e, carries an adjusting screw 6* which engages a. nut 6 connected. to one end of a tension spring 6 the other end of which is connected, as at e to an arm f which is integral with the rock shaft g. An adjustable limit screw 6 is also carried by the arm 6 and is arranged to bear against the arm 7. By this construction the tension of the spring 6 can be regulated and the pressure with which the feed roller 0 is held toward the knife and the presser foot, in the swinging movement of the roller about the axis of the spindle e, can be adjusted.

The rock shaft 9, mounted as hereinafter described, has an arm 9 to which is connected one end of a tension spring 9 the other end of which is connected, as at 9 to a fixed part of the frame, so that the roller 0 is held toward the knife with a yielding pressure.

It will be understood that through adjustment of the screw 6 the axial position of No. 949,062, but in order that the feed roller 0, with respect to the knife can be adjusted through the swinging of the roller about the axis of the spindle c, and that the pressure with which the roller is held toward the cutting edge of the knife is regulated, independently of the position of the knife, through adjustment of the tension of the spring 6 by the adjusting screw 6 As pointed out insaid Letters Patent, the adjustment of the roller with respect to the rock shaft, that is, adjustmentof the actual position of the roller with; respect to the knife, and the adjustment of.-the pressure spring a, are not affected by the movement of the rock shaft about its own axis to ac commodate varying thickness of the material operated upon.

In the construction shown in said Letters Patentthe rock shaft 9 is center-punched at its ends for co-operation with the pivot pointsg and 9 one Or both ofwhich must be backed off, and therefore suffer change in adjustment, whenever the feed roller, is

to be removed, as happens frequently in the operation of thenmachine. Inorder to facilitate the removal of the rollerfrom prox imity to. the knife and to avoid.;change in adjustment, of the pivot pins, the, rockshaft g is bored out axially, asat gt, for aportion. of;i ts length, LI1(lv1'8C,Gl"GS a sliding spindle 9 which is center-punched at its end to cooperate with the pivotpin 9 the end of the spindle g? preferably being end of the, rock shaft g .in normaloperation,

with which the roller is held by the flush with the.

and the end of the rock shaft being slotted as indicated at g The spindleg is slidable endwise in the rock shaft gand is provided with a locking pin 9 preferably threaded into the spindle, the rock shaft being provided as at g with a keyhole slot to co-operate with the locking pin. hen the locking pin g is withdrawn so as to free its enlarged portion from the keyhole slot 9 the spindle 9 can be withdrawn from engagement with the pivot pin 9 thereby permitting the rock shaft 9 and the feed roller a to beremoved without affecting the adjustment of thespivot pins 9 g. When the locking pin, is in engagement with the keyhole slot 9 as shown in Figure 1, the spindleg is held in engagement with the pivot pin g? and the feed roller is then properly supported in workingrelation with the knife, p

I claim as my invention;

The combination of I a frame, a shaft, pivot pinslmounted adjustahlyinthe frame for supportingthe shaft, a movable spindle carried by; the-shaft, and engaging one of said pivot pins, whereby, on

withdrawing the sp1ndle, the rockshaft-is.-

releasedfrom the p vot pins, anda locking pin in engagement wlth the spindle, the shaft being formed for engagement; with the locking pin to permit longitudinal movement ofthespindle andto secure thesame in adjusted 1 position with respect/to the, shaft.

GEORGE IE L, 111-.

longitudinally; 

